Rock-drill



3 Sheets-'Sheet 1.

(No Mogel.)

H. BQMOCABB.

ROCK D RILL.

Pat'entedOct. 22, 1895,

V Mr, Li 1 LUM lull Lulllr INVENTOR HAB. Cabe.

ATTORNEY @unam s nmummgmqmgagmymmus (No Model) 3 sheets-sheetv 2.

H. B. MGC-ABE. Y vR061( DRILL. l No. 548,324. Patented Dot.. 22, 1895.

IN VENT 0R H 5. /V-C Cabe By- ATTURNEY s sheets-sheet 3.

H. B. MCCABE.

yROCK DRILL. v

. Patented 001;. 22, 1895.

(No Model.) No. 548.324.

INVENTOR h. B. Mc Cabe AITORNEY Diarree STATES PATENT OFFICE.

HORACE B. MCCABE,`OF LAKEWOOD, COLORADO.

ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 548,324, dated October22, 1895.

Application led December 26, 1894. Serial No. 532,907. (No model.)

To all whom it may concern,.-

Be it known that I, HORACE B. MCOABE, a citizen of the United States ofAmerica, residing at Lakewood, in the county of Jefferson and State ofColorado, have invented certain new and useful Improvements inRock-Drills; and I do declare the following to be a full,

clear, and exact description of the invention,-

such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part ofthis specification.

My invention relates to improvements in rock-drills; and it consists ofthe features, arrangements, and combinations hereinafter described andclaimed, all of which will be fully understood by reference to theaccompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a side elevation of my improved drill. Fig.2 is a longitudinal section taken on the line C C, Fig. 1. Fig. 3 is asection taken on the line D D, Fig. 1. Fig. 4 is a section taken on theline V V, Figs. 1 and 2, looking toward the right. Fig. 5 is a sectiontaken on the line Z Z, Figs. 1 and 2, looking toward the left. Fig. 6 isa section taken on the line W W, Figs. 1 and 2. Fig. 7 is a sectiontaken on the linec't', Fig. 8. Fig. Sis a section taken on the line g g,Fig. 7. Fig. 9 is a section taken on theline h h, Figs. 1 and 2. Fig. 10is an end elevationofthe drill shown in connection with thesupportingcolumn. Fig..11 is a section taken on the line B B, Fig. 10,looking toward the right, the parts being shown on a larger scale. Fig.12 is a fragmentary longitudinal section of the horizontal shaftattached to the column.l Fig. 13 is a vertical section taken through thefoot of the column. Fig. 14 is a section taken on the line A A, Fig. 13.Fig. l5 is a section taken through the tension-cap of the drillcasing.Fig. 16 is a cross-section taken on the line S S, Fig. 15. Fig. 17 is asection taken on the line p p, Figs. 1 and 2.

Similar reference-characters indicating corresponding parts or elementsin these views, let the numeral 5 designate the drill-casing, having thebase 5a, fashioned to fit the track 6, having the toothed rack 6a. Thebottom of this track is dovetailed to iit a socket 7- of correspondingshape made in a cross-head 7, formed on one extremity of a horizontalbar 7. This bar ishollow, and the opening therein registers with anopening in the crosshead extremity at right angles to `the dovetailedsocket 7a. In this opening of the crosshead is inserted a keeper 8,having a socket 8a, adapted to register with the socket 7a'. The keeper8 has a threaded extremity protruding from the cross-head. The functionof the keeper is to lock the track on the bar 7, and this isaccomplished by applying a nut to the threadedextremity of the keeperand screwing it to engagement with the cross-head.

It is evident that the track may be securely locked on the bar in thismanner.

The column 9 is provided with a base 9, which is fastened to afoot-block 10 by a pin 12. In the base of this block is formed a socket,which receives a counterpart-lug 10', formed on the foot-block. The baseof the column rests upon the lug 10a of the' foot-block,

while there is a space between the base of the block and the base of thecolumn whereby the colmn may occupy a position inclined to the plane ofthe foot-block. The bottom of the foot-block is provided withball-supports 10, which engage sockets 10d of the block.

To the column 9 is applied a two-part clamp 13, secured to the column bymeans of a screw inserted in coinciding threaded apertures formed in thelugs of the clamp parts. Formed vintegral with one part of this clamp isa lug .14, having a clutch-face formed thereon to engage another similarface formed on a hanger 15, which is fastened to the lug by a screw 16.

Upon the lower part of this hanger is formed -trudes through thetension-cap 2O and is pro- IOO requires that the power necessary forforcing the hammer against its spring be suddenly expended, otherwiseone cam would catch the hammer before it was released by the other,which of course would make the construction inoperative.

I do not limit my invention to the construction and larrangement of thehammer parts herein shown and described, as I am aware that other formsmay be employed without departing from the spirit of the invention.

The tension-cap 2O is provided with interiorly-projecting lugs 20a,which engage slots 5S, formed in the shell ot` the casing. The cap islocked in place when properly adjusted by giving it a partial rotation,whereby the lugs 20a are made to engage notches 5", formed along theedges of the slots and communicating therewith.

Having thus described my invention, what I claim isl. In a rock drill,the combination with the casing, the chuck, the bit and suitableoperating cams, of a hammer comprising two independently operated parts,one being hollow and surrounding the other which telescopes `therein,and both being always in line with the chuck stem, substantially asdescribed.

2. In a rock drill, the combination with the casing and operating cams,of the hammer comprising two independently operated parts, one beinghollow and surrounding the other which telescopes therein and bothoperating on the same drill bit, substantially as described.

3. In a rock drill, the hammer comprising two independently operatedreciprocating parts, one being hollow and surrounding the other whichtelescopes therein, substantially' as described.

4. In a rock drill, the combination with the casing and operating cams,of a hammer comprising two independently operated, springactuated parts,one being hollow and surrounding the other which telescopes therein,substantially as described.

5. In a rock drill, the combination with the casing and operating cams,of a hammer comprising two independently operated parts, one beinghollow and surrounding the other which telescopes therein and ahseparate spring acting on each part, substantially as described.

6. In a rock drill, the combination with the casing, the track havingthe toothed rack, and the worm block journaled in the casing andengaging the rack, of the auxiliary cam, the rod eXteriorly mounted onthe casing, a coil spring surrounding said rod which is provided with alug lying in the path of the auxiliary cam, `a ratchet collar made fastto vone eX- tremity of the worm block, a dog engaging the teeth ofA saidcollar, and a lever having one extremity engaging the dog, and the otherextremity slotted to engage the lug on the rod, substantially asdescribed.

7. The combination with the drill ofthe upright column, the foot-blockhaving a lug engaging a counterpart socket formed in the base of thecolumn, a pin connecting the base ofthe column with the lug on thefoot-block, there being a space left between the bottom ot the columnand the base of the block, the clamp attached to the column, a hangeradjustably attached to the clamp, a bar clamped on the hanger, said barbeing provided with a socket adapted to receive the track of the drill,and a keeper attached to the bar for locking the drill on the bar,substantially as described.

In testimony whereof I aflix my signature in the presence of twowitnesses.

HORACE B. MCOABE. Witnesses:

A. J. OBRIEN, CEAS. E. DAWSON.

